⚡Bulletin: "Amazon has held advanced discussions about the possibility of opening its highly sought-after second headquarters in Crystal City," just outside D.C. in Arlington, Va., the WashPost scoops. "The discussions were more detailed than those the company has had regarding other locations in Northern Virginia and some other cities nationally."

1 big thing: A tale of three presidents

President Trump and President Obama have gleefully turned Tuesday's midterms into a proxy fight over their legacies, while President Clinton is sidelined during a season when he had dreamed of being back in the spotlight.

Trump and Obama, each a human turnout machine for their parties, have poured on the multi-stop days, and clearly relish trolling each other across the battlegrounds:

Trump: "I heard President Obama speak today. I had to listen. I was in the plane. I had nothing else to do."

Obama: "Everything I say, you can look up on the internet. ... Here's your chance to vote for people who actually know what the internet is."

Trump: "I listened to President Obama today. He had a very small crowd, I have to be honest. They don’t tell you that. Y'know, they don't tell you that."

Obama: "Right now, Republicans are all: 'Look, the economy is so good.' Where do you think that started? When did that start?”

The N.Y. Times' Peter Baker writes that Obama looks energized as he violates the tradition of his predecessors, who have rarely directly attacked their successors:

"Obama’s voice has a way of lifting into a high-pitched tone of astonishment when he talks about his successor, almost as if he still cannot believe that the Executive Mansion he occupied for eight years is now the home of President Trump."

Trump has stuck to the friendly contours of Trump country, mostly traveling to "counties that are whiter, less educated and have lower incomes than the rest of the United States, according to Census Bureau data," per AP's Josh Boak:

"Since March, Trump has crisscrossed the country like a salesman with a set territory. The majority of his trips have been to just nine states. They are Ohio, Pennsylvania, Tennessee, Florida, Missouri, Montana, Indiana, West Virginia and Nevada. Trump won eight of those states in 2016, but not Nevada."

3. Why Tuesday matters

"The key word ... in this election is 'unraveling.' I think there's a sense, both on the Republican side and the Democratic side, that something is unraveling."

"From the Republican side, it's immigration is causing a social unraveling. Media elites are causing a cultural unraveling. There's an unraveling between men and women on gender roles."

"[O]n the Democratic side, there's a sense that our norms are unraveling, our sense of unity and tolerance is unraveling."

"[I]t's not a normal election, because it's about existential angst and a sense of fear that something fundamental is happening in our society. And so, yes, it is about health care. Yes, it is about immigration. But there's that much deeper sense of anxiety that I think is really what this election is about."

4. Images from Pittsburgh

5. Nigerian army uses Trump words to justify shooting rock-throwers

N.Y. Times Quote of the Day ... John Agim, a spokesman for the Nigerian Army, on using the words of President Trump to justify the army’s fatal shootings of rock-throwing protesters, an act condemned by Amnesty International:

"We released that video to say if President Trump can say that rocks are as good as a rifle, who is Amnesty International?"

9. "It’s not your imagination: Phone battery life is getting worse"

"I’ve been performing the same battery test over and over again on 13 phones," WashPost tech columnist Gene Fowler writes on the cover of tomorrow's Business section:

"With a few notable exceptions, this year’s top models underperformed last year’s. The new iPhone XS died 21 minutes earlier than last year’s iPhone X. Google’s Pixel 3 lasted nearly an hour and a half less than its Pixel 2."

"Phone makers tout all sorts of tricks to boost battery life, including more-efficient processors, low-power modes and artificial intelligence to manage app drain. Yet my results, and tests by other reviewers I spoke with, reveal an open secret in the industry: the lithium-ion batteries in smartphones are hitting an inflection point where they simply can’t keep up."

Why it's happening: "Blame it on the demands of high-resolution screens, more complicated apps and, most of all, our seeming inability to put the darn phone down."

10. 1 fun thing

"With younger people harder to reach through the traditional methods of landline phones and mail, political strategists are trying to reach the next generation where they are: online and looking for love. Dating apps typically don’t take much time or money, always a boon for campaigns and less-official volunteers."

"In Colorado, which has tight elections this year as well as a particularly long and complex ballot, one civic education group created a 'speed dating' event where bumper stickers were exchanged in lieu of phone numbers."

"Impressed by Sen. Heidi Heitkamp’s 'no' vote on Justice Kavanaugh," Ben Luke, an assistant producer in London, "used Tinder to seek out matches in Ms. Heitkamp’s home state of North Dakota."